Home / 20,950.92-28,912.78-11,391.36

Finding the Fourth Proportional to 20,950.92, 28,912.78 and 11,391.36

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Solution

The fourth proportional to 20,950.92, 28,912.78 and 11,391.36 is: 15,720.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.92 : 28,912.78 = 11,391.36 : x
  2. Step 2: Convert to fraction form
    20,950.92/28,912.78 = 11,391.36/x
  3. Step 3: Cross multiply
    20,950.92x = 28,912.78 × 11,391.36
  4. Step 4: Simplify right side
    20,950.92x = 329,355,885.58
  5. Step 5: Solve for x
    x = 329,355,885.58/20,950.92
  6. Step 6: Final answer
    x = 15,720.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.